When Traffic is On, you can get access to FlightPlan Panel.
When you enter Departure Airport, Arrival airport, Alternate airport, cruise flightlevel and CallSign, you may:
1.Generate flightplan with “Generate” button.
2.Or Enter flightplan by hands
3.Or Import flightplan from aircraft C0Rte/FMGS (if supported, like JARDesign a320/330)
4.Or Import flightplan from text file with ICAO-format flightplan string (may use Routefinder website as example http://rfinder.asalink.net/free/ )
5.Export entered/generated/readed flightplan direct to aircraft FMGS and text file (if supported, like JARDesign a320/330)
6.Sent flightplan to ATC to continue work with ATC.
*** If Generate function not work well for some Departure/Arrival pair, best way – to use routefinder website, prepare text file with ICAO-format flightplan string and import it with Plight Plan panel.